Supplemental Financial Information - Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Sep. 29, 2020	Dec. 31, 2019
Supplemental Financial Information [Abstract]
Prepaid insurance	$ 1,189	$ 724
Prepaid occupancy related costs	863	834
Other prepaid expenses	1,861	2,075
Other current assets	39	1,753
Prepaid expenses and other assets	$ 3,952	$ 5,386

Amount of asset related to consideration paid in advance for insurance that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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Name:	us-gaap_PrepaidInsurance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant